<template>
    <div>
        <!-- 面包屑导航区域 -->
     <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/home' }">首页 </el-breadcrumb-item>
        <el-breadcrumb-item>商品管理</el-breadcrumb-item>
        <el-breadcrumb-item>添加商品</el-breadcrumb-item>
     </el-breadcrumb>
     <!-- 卡片视图区域 -->
     <el-card>
         <!-- 提示区域 -->
          <el-alert
               title="添加商品信息"
               type="info"
               center
               show-icon
               :closable="false"
               >
          </el-alert>
          <!-- 步骤条区域 -->
         <el-steps :space="200" :active="activeIndex -0" finish-status="success" align-center>
             <el-step title="基本信息"></el-step>
             <el-step title="商品参数"></el-step>
             <el-step title="商品属性"></el-step>
             <el-step title="商品图片"></el-step>
             <el-step title="商品内容"></el-step>
             <el-step title="完成"></el-step>
         </el-steps>
         <!-- tab栏区域 -->
     <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top">
        <el-tabs tab-position="left" v-model="activeIndex" :before-leave="beforeTableave"
         @tab-click="tabClicked">
            <el-tab-pane label="基本信息" name="0">
                  <el-form-item label="商品名称" prop="goods_name">
                     <el-input v-model="addForm.goods_name"></el-input>
                  </el-form-item>
                  <el-form-item label="商品价格" prop="goods_price">
                     <el-input v-model="addForm.goods_price" type="number"></el-input>
                  </el-form-item>
                   <el-form-item label="商品重量" prop="goods_weight">
                     <el-input v-model="addForm.goods_weight" type="number"></el-input>
                  </el-form-item>
                   <el-form-item label="商品数量" prop="goods_number">
                     <el-input v-model="addForm.goods_number" type="number"></el-input>
                  </el-form-item>
                  <el-form-item label="商品分类" prop="goods_cat">
                       <el-cascader
                        v-model="addForm.goods_cat"
                        :options="catelist"
                        :props="cateProps"
                        @change="handleChange"
                        expand-trigger="hover">
                      </el-cascader>
                  </el-form-item>
            </el-tab-pane>
            <el-tab-pane label="商品参数" name="1">
                <!-- 渲染表单的Item项 -->
                 <el-form-item :label="item.attr_name" v-for="item of manyTableData" :key="item.attr_id">
                     <!-- 复选框组 -->
                      <el-checkbox-group v-model="item.attr_vals" >
                         <el-checkbox :label="manyitem" v-for="(manyitem,i) of item.attr_vals" :key="i" border></el-checkbox>
                      </el-checkbox-group>
                  </el-form-item>
            </el-tab-pane>
            <el-tab-pane label="商品属性" name="2">
                 <el-form-item :label="item2.attr_name" v-for="item2 of onlyTableData" :key="item2.attr_id">
                     <el-input v-model="item2.attr_vals"></el-input>
                 </el-form-item>
            </el-tab-pane>
            <el-tab-pane label="商品图片" name="3">
                <!--action： 图片上传的地址 -->
                <el-upload
                        :action="uploadURL"
                        :on-preview="handlePreview"
                        :on-remove="handleRemove"
                        list-type="picture"
                        :headers="headerObj"
                        :on-success="handleSuccess">
                        <el-button size="small" type="primary">点击上传</el-button>
                </el-upload>
            </el-tab-pane>
            <el-tab-pane label="商品内容" name="4">
                <!-- 富文本编辑器组件 -->
                 <quill-editor v-model="addForm.goods_introduce"></quill-editor>
                 <!-- 添加商品的按钮 -->
                 <el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
            </el-tab-pane>
        </el-tabs>
     </el-form>
     </el-card>
     <!-- 图片预览 -->
     <el-dialog
        title="图片预览"
        :visible.sync="previewVisible"
        width="50%"
        >
          <img :src="previewPath" alt="" class="previewImg">
      </el-dialog>
    </div>
</template>

<script>
import _ from 'lodash'
export default {
    data() {
        return {
            activeIndex:'0',
            // 添加商品的表单数据对象
            addForm:{
                goods_name:'',
                goods_price:0,
                goods_weight:0,
                goods_number:0,
                // 商品所属的分类数组
                goods_cat:[],
                // 图片的数组
                pics:[],
                // 商品的详情描述
                goods_introduce:'',
                attrs:[]

            },
            addFormRules:{
                goods_name:[
                     { required: true, message: '请输入商品名称', trigger: 'blur' },
                ],
                goods_price:[
                     { required: true, message: '请输入商品价格', trigger: 'blur' },
                ],
                goods_weight:[
                     {required: true, message: '请输入商品重量', trigger: 'blur' },
                ],
                goods_number:[
                    {required: true, message: '请输入商品数量', trigger: 'blur' },
                ],
                goods_cat:[
                     {required: true, message: '请选择商品分类', trigger: 'blur' },
                ]
            },
            // 商品分类列表
            catelist:[],
            cateProps:{
                label:'cat_name',
                value:'cat_id',
                children:'children'
            },
            // 动态参数列表数据
            manyTableData:[],
            // 静态参数列表数据
            onlyTableData:[],
            // 上传图片的地址
            uploadURL:'http://127.0.0.1:8888/api/private/v1/upload',
            // 图片上传组件的headers请求头对象
            headerObj:{
                 Authorization:window.sessionStorage.getItem('token')
            },
            previewPath:'',
            previewVisible:false
            
        }
       
    },
    created(){
        this.getCateList()
    },
    methods: {
        // 获取所有商品分类数据
        getCateList(){
            this.axios.get('categories').then(result=>{
                if(result.data.meta.status!==200) return this.$message.console.error('获取是商品分类数据失败！');
                this.catelist = result.data.data
                console.log(this.catelist)
            })
        },
        // 级联选择器选中项变化
         handleChange(){
            if(this.addForm.goods_cat.length!==3){
                this.addForm.goods_cat=[]
                
            }
            console.log(this.addForm.goods_cat)
        },
        beforeTableave(activeName,oldActiveName){
            // console.log('当前'+activeName+'旧的'+oldActiveName)
            if(oldActiveName==='0' && this.addForm.goods_cat.length!==3){
                 this.$message.error('请先选择商品分类');
                return false

            }
            return true
        },   
        tabClicked(){
            // console.log(this.activeIndex)
            //当访问1的时候，证明访问的是动态参数面板
            if(this.activeIndex === '1'){
               this.axios.get(`categories/${this.cateId}/attributes`,{params:{sel:'many'}}).then(res=>{
                   if(res.data.meta.status!==200) return this.$message.error('获取参数失败')
                   this.$message.success('获取参数成功')
                   res.data.data.forEach(item=>{
                     item.attr_vals = item.attr_vals.length ==0 ?[]: item.attr_vals.split(',')
                   })
                   this.manyTableData = res.data.data
                   console.log(this.manyTableData)
               })
            }else if(this.activeIndex=='2'){
                 this.axios.get(`categories/${this.cateId}/attributes`,{params:{sel:'only'}}).then(res=>{
                       if(res.data.meta.status!==200) return this.$message.error('获取静态属性失败')

                       this.onlyTableData = res.data.data
                       console.log( this.onlyTableData)
                 })
            }
        },
        // 处理图片预览效果
        handlePreview(file){
            console.log(file)
            this.previewPath = file.response.data.url
            this.previewVisible = true
        },
        // 处理移出图片的操作
        handleRemove(file){
        // 1.获取将要删除的图片的临时路径
        const filePath = file.response.data.tem_path
        // 2.从pics 数组中，找到这个图片对应得索引值
        const i = this.addForm.pics.findIndex(x=>x.pic===filePath)
        // 3.调用数组的splice方法，把图片信息对象，从pics数组中移出
        // this.addForm.pics.splice(i,1)
        console.log(this.addForm)
        },
        // 监听图片上传成功的事件
        handleSuccess(response){
            console.log(response)
            // 1.拼接得到一个图片信息对象
            const filpng = {pic:response.data.tmp_path}
            //2.将图片信息对象，push到pics数组中
             this.addForm.pics.push(filpng)
            console.log( this.addForm)
        },
        // 添加商品
        add(){
            console.log( this.addForm)
            this.$refs.addFormRef.validate(valid=>{
                if(!valid) return this.$message.error('请填写必要的表单项！')
                // 执行添加的业务逻辑
                // lodash cloneDeep(obj)深拷贝
                const form = _.cloneDeep(this.addForm)
                form.goods_cat = form.goods_cat.join(',')
                // 处理动态参数
                this.manyTableData.forEach(item=>{
                    const newInfo ={attr_id:item.attr_id,attr_value:item.attr_vals.join(',')}
                    this.addForm.attrs.push(newInfo)
                })
                // 处理静态属性
                  this.onlyTableData.forEach(item=>{
                    const newInfo ={attr_id:item.attr_id,attr_value:item.attr_vals}
                    this.addForm.attrs.push(newInfo)
                })
                form.attrs=this.addForm.attrs
                console.log(form)
                
                //发起请求添加商品
                // 商品的名称，必须是唯一的
                this.axios.post('goods',form).then(res=>{
                        console.log(res)
                        if(res.data.meta.status!==201) return this.$message.error('添加商品失败')
                        this.$message.success('添加商品成功')
                        this.$router.push('/goods')
                })
            })
        }
    },
    computed:{
        cateId(){
            if(this.addForm.goods_cat.length===3){
                return this.addForm.goods_cat[2]
            }
            return null
        }
    }
}
</script>
<style scoped>
    .el-checkbox{
        margin: 0 5px 0 0 !important;
    }
    .previewImg{
        width: 100%
    }
    .btnAdd{
        margin-top: 15px
    }
</style>
